This standard applies to straight pipes used in pipelines for transporting corrosive media in the chemical, petroleum and other industries, with an operating pressure of 3kgf/cm|(2). It also applies to straight pipes in pipelines for similar purposes in other departments.
HG/T 3191-1980 history
2014HG/T 2059-2014 Technical regulations for imperious graphite tube
2004HG/T 2059-2004 Technical regulations for imperious graphite tube